Recommended Assembly Torques Class 4.6 ISO Metric Coarse Pitch Bolts & Screws Diameter M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M48 M56 M64 Pitch (mm) 0.35 0.40 0.45 0.50 0.70 0.80 1.00 1.25 1.50 1.75 2.00 2.00 2.50 2.50 2.50 3.00 3.00 3.50 3.50 4.00 4.00 4.50 5.00 5.50 6.00 Bolt Tension Corresponding to 65% of Proof Load kN 0.19 0.31 0.50 0.73 1.29 2.08 2.94 5.34 8.45 12.4 16.8 22.9 28.1 35.8 44.3 51.6 67 81.9 101 120 143 164 215 298 393 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, as supplied Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Recommended Assembly Torque Nm 0.06 0.12 0.25 0.44 1 2.1 3.5 8.5 17 30 47 73 101 143 195 248 362 491 669 864 1115 1378 2064 3338 5030 Recommended Assembly Torques BSW Mild Steel Bolts & Screws Diameter 1/4” 5/16” 3/8” 7/16” 1/2” 5/8” 3/4” 7/8” 1” 1.1/8” 1.1/4” 1.1/2” Threads Per Inch (TPI) 20 18 16 14 12 11 10 9 8 7 7 6 Bolt Tension Corresponding to 65% of Proof Load lbf Recommended Assembly Torque lbft 736 1208 1786 2451 3176 5206 7705 10641 13943 17566 22473 32334 3 6 11 18 26 54 96 155 232 329 468 808 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, as supplied Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Recommended Assembly Torques Class 8.8 ISO Metric Coarse Pitch Bolts & Screws Diameter M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M48 M56 M64 Pitch (mm) 0.35 0.40 0.45 0.50 0.70 0.80 1.00 1.25 1.50 1.75 2.00 2.00 2.50 2.50 2.50 3.00 3.00 3.50 3.50 4.00 4.00 4.50 5.00 5.50 6.00 Bolt Tension Corresponding to 65% of Proof Load kN 0.48 0.78 1.28 1.9 3.32 5.35 7.54 13.8 21.9 31.8 43.4 59.2 74.8 95.6 118 138 179 219 270 319 380 437 573 792 1045 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Plain Steel, as supplied Recommended Assembly Torque Nm 0.15 0.31 0.64 1.1 2.7 5 9 22 44 77 122 190 269 372 519 640 967 1314 1782 2297 2970 3671 5500 8870 13376 Recommended Assembly Torques Class 10.9 ISO Metric Coarse Pitch Bolts & Screws Diameter M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 Pitch (mm) 0.80 1.00 1.25 1.50 1.75 2.00 2.00 2.50 2.50 2.50 3.00 3.00 3.50 3.50 4.00 4.00 Bolt Tension Corresponding to 65% of Proof Load kN 7.67 10.9 19.8 31.3 45.5 62.1 84.5 103 132 164 190 248 303 371 441 527 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Plain Steel, as supplied Recommended Assembly Torque Nm 8 13 32 63 109 174 270 371 528 722 914 1339 1817 2449 3173 4110 Recommended Assembly Torques Class 12.9 ISO Metric Coarse Pitch Bolts & Screws Diameter M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 Pitch (mm) 0.50 0.70 0.80 1.00 1.25 1.50 1.75 2.00 2.00 2.50 2.50 2.50 3.00 3.00 3.50 3.50 4.00 Bolt Tension Corresponding to 65% of Proof Load kN 3.17 5.54 8.97 12.7 23.1 36.6 53.2 72.8 98.8 121 155 191 222 289 354 437 515 To convert kN to lbf; Multiply Kn by 224.809 ly Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Plain Steel, as supplied Recommended Assembly Torque Nm 1.9 4.4 8.9 15 37 73 128 203 316 436 620 840 1066 1561 2124 2884 3708 Recommended Assembly Torques SAE Grade 5 Bolts & Screws – UNF Thread Diameter 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1.1/8 1.1/4 1.3/8 1.1/2 Threads Per Inch (TPI) 28 24 24 20 20 18 18 16 14 12 12 12 12 12 Bolt Tension Corresponding to 65% of Proof Load lbf Recommended Assembly Torque lbft 2010 3180 4840 6560 8840 11240 14170 20600 28100 36600 41100 51600 63200 76000 8 17 30 48 74 105 148 258 410 610 771 1075 1448 1900 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, as supplied Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Recommended Assembly Torques SAE Grade 8 Bolts & Screws – UNF Thread Diameter 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1.1/8 1.1/4 1.3/8 1.1/2 Threads Per Inch (TPI) 28 24 24 20 20 18 18 16 14 12 12 12 12 12 Bolt Tension Corresponding to 65% of Proof Load lbf Recommended Assembly Torque lbft 2820 4510 6820 9230 12480 15860 19950 29120 39700 51700 66700 83700 102500 123300 12 23 43 67 104 149 208 364 549 862 1241 1744 2349 3083 SAE Grade 5 & 8 Bolts & Screws – 1” SAE Diameter 1” SAE Grade 5 Grade 8 Threads Per Inch (TPI) 14 14 Bolt Tension Corresponding to 65% of Proof Load lbf Recommended Assembly Torque lbft 37500 53000 625 883 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, as supplied Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Recommended Assembly Torques Diameter 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1.1/8 1.1/4 1.3/8 1.1/2 1.3/4 2 2.1/4 2.1/2 2.3/4 3 3.1/4 3.1/2 3.3/4 4 SAE Grade 5 Bolts & Screws – UNC Thread Bolt Tension Corresponding to 65% of Proof Load Thread Per Inch lbf (TPI) 20 1760 18 2890 16 4290 14 5880 13 7860 12 10070 11 12480 10 18460 9 25550 8 33470 7 36700 7 46600 6 55500 6 67600 5 91300 4.5 120200 4.5 156300 4 192400 4 237100 4 287100 4 341500 4 400600 4 464600 4 532900 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Plain Steel, as supplied Recommended Assembly Torque lbft 7 15 27 43 66 94 130 231 373 558 688 971 1272 1690 2663 4007 5861 8017 10867 14355 18498 23368 29038 35527 Recommended Assembly Torques Diameter 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1.1/8 1.1/4 1.3/8 1.1/2 1.3/4 2 2.1/4 2.1/2 2.3/4 3 3.1/4 3.1/2 3.3/4 4 SAE Grade 8 Bolts & Screws – UNC Thread Bolt Tension Corresponding to 65% of Proof Load Thread Per Inch lbf (TPI) 20 2470 18 4090 16 6040 14 8320 13 11050 12 14170 11 17610 10 26060 9 36000 8 47200 7 59500 7 75500 6 90000 6 109500 5 148200 4.5 195000 4.5 253500 4 312000 4 384500 4 465600 4 553800 4 649700 4 753400 4 864200 To convert kN to lbf; Multiply Kn by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 Surface Condition Torque Adjustment Factors x 1.0 Plain Steel, as supplied Plain Steel, degreased x 2.0 Zinc Plated, as supplied x 1.0 Zinc Plated, lightly oiled x 0.9 Galvanised, degreased x 2.1 Galvanised, lightly oiled x 1.1 Heavily greased x 0.7 Recommended Assembly Torque lbft 10 21 38 61 92 133 183 326 525 787 1116 1573 2063 2738 4323 6500 9506 13000 17623 23280 29998 37899 47088 57613
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